[th04/res_huma] Initial state

Yep, in TH04 and TH05, ZUN.COM is a COM wrapper inside a COM wrapper.
And yep, "HUMA", despite this being TH04?
[th04/res_huma] Reduce all known library functions

Different API for file handling, but the ratio of ZUN code to library code is
still exactly the same as in TH03.